A bicycle locking device

Abstract

A bicycle locking device including a shackle with first and second arms, a lockable crossbar releasably engaging the first and second arms to form a closed loop with the shackle. The shackle and crossbar including an inner core, with an outer topside and an outer underside. At least one plate of high performance material is secured to the topside and underside of the shackle and crossbar to sandwich the inner core therebetween. The high performance material is harder and more brittle than the inner core.

1 . A bicycle locking device comprising:
 a shackle comprising first and second arms;   a lockable crossbar releasably engaging the first and second arms to form a closed loop with the shackle;   the shackle and the crossbar comprising an inner core, with an outer topside and an outer underside,   wherein at least one plate of high performance material is secured to the topside and of the shackle and the crossbar, and at least one plate of high performance material is secured to the underside of the shackle and the crossbar, to sandwich the inner core therebetween,   and wherein the high performance material is harder and more brittle than the inner core.   
     
     
         2 . The bicycle locking device of  claim 1 , wherein the lockable crossbar releasably engages a free end of the first and second arms to form a closed loop with the shackle. 
     
     
         3 . The bicycle locking device of  claim 1 , wherein, when fastened together, a closed loop of high performance material is created. 
     
     
         4 . The bicycle locking device of  claim 1 , wherein the shackle is U-shaped. 
     
     
         5 . The bicycle locking device  claim 1 , wherein a rigid D-lock is formed when the crossbar is fastened to the shackle. 
     
     
         6 . The bicycle locking device  claim 1 , wherein the topside and underside of the shackle and crossbar are parallel. 
     
     
         7 . The bicycle locking device  claim 1 , wherein the high performance material forms a continuous loop along the topside and underside of the shackle and crossbar. 
     
     
         8 . The bicycle locking device  claim 1 , wherein the high performance material is secured to at least three of the four corner vertices of the shackle and crossbar. 
     
     
         9 . The bicycle locking device  claim 1 , wherein a steel plate is sandwiched between the high performance material and the shackle. 
     
     
         10 . The bicycle locking device  claim 1 , wherein the high performance material is bonded to the shackle via a glue or resin. 
     
     
         11 . The bicycle locking device  claim 1 , wherein a single piece of high performance material runs the length of the crossbar such that, when the crossbar is connected to the shackle, the single piece of high performance material forms part of a continuous loop of high performance material. 
     
     
         12 . The bicycle locking device  claim 1 , wherein two parallel pieces of high performance material run along the length of the crossbar such that, when the crossbar is connected to the shackle, the high performance material forms part of a continuous loop of high performance material along both the topside and underside of the locking device. 
     
     
         13 . The bicycle locking device  claim 1 , wherein a hardened steel shell encloses the crossbar. 
     
     
         14 . The bicycle locking device according to  claim 13 , wherein the hardened steel shell encloses high performance material contained within the crossbar. 
     
     
         15 . The bicycle locking device of  claim 1 , wherein the first arm comprises four pieces of high performance material on the topside and four pieces of high performance material on the underside, the second arm comprises four pieces of high performance material on the topside and four pieces of high performance material on the underside, and the curved portion of the U-shaped shackle comprises three pieces of high performance material on the topside and three pieces of high performance material on the underside. 
     
     
         16 . The bicycle locking device  claim 1 , wherein the pieces of high performance material positioned on the straight portions of the U-shaped shackle are rectangular. 
     
     
         17 . The bicycle locking device  claim 1 , comprising curved pieces of high performance material position on the curved portion of the U-shaped shackle. 
     
     
         18 . The bicycle locking device  claim 1 , wherein the topside and underside of the shackle are opposite to each other with the inner core therebetween. 
     
     
         19 . The bicycle locking device  claim 1 , wherein the topside and underside of the crossbar are opposite to each other with the inner core therebetween.